Application and distribution of electric motive power, particularly for use in starting machinery and for similar purposes.



G. W. MASGORD. APPLICATION AND DISTRIBUTION OI ELECTRIC MOTIVE POWER- PARTICULARLY FOR USE IN STARTING MACHINERY AND FOR SIMILAR PURPOSES.

Patented Apr. 27, .1909.

APPLICATION FILED APR. 9, 1906. 920,073.

- I 2 SHEETS-SHEET 1.

G. W. MASCQRD. APPLICATION AND DISTRIBUTION OF ELECTRIC MOTIVE POWER, PARTICULARLY FOR USE IN STARTING MACHINERY AND FOR SIMILAR PURPOSES. I

APPLICATION FILED APR. 9, 1906. I

' Patented Apr. 27, 1909.

2 SHEETS-SHEET 2.

m/m. m

GEORGE W. MASCORD, OF

LONDON, ENGLAND.

OF ELECTRIC MOTIVE POWER, PARTICULARLY FOR USE IN STARTING MACHINERY AND FOR SIMILAR PURPOSES.

Specification of Letters Patent. Original application filed January 9, 1905, Serial No. 240,257. Divided and Patented April 27, 1909.

Serial No. 310,748.

To all whom it may concern:

Be-it known that I, GEORGE WILLIAM MAsooRD, 'a subject of the King of Great Britain and Ireland, residing at 5, The Crescent, Church Road, Barnes, London, England, have invented certain new and useful improvements relatin an distribution of electric motive particularly for use in starting mac inery and for similar purposes, of which the followin .isa specification.

hlS invention relates to the application j 25. 1 normal spee bysproviding the control lever and distribution of motive power, particularly in starting machinery where electromotors are employed as the source of motive power, and. where a powerful starting effort is required.

The invention relates more especially to the. subject matter of the prior application for Letters Patent in the United States filed January 9th, 1905, Serial No. 240,257, of which the present application is a division.

According; to the invention I provide means for increasing the speed of the driven machine or, ress after it has attained its to havea movementbeyond the position assumed by it for giving normal speed, so that in this further movement resistance may be switched in by which the motor fields may be weakened and thus the speed of the motor accelerated.

The invention is illustrated in the accompanying drawing, in which- Fi ure 1 is a diagram illustrating a control ever with the motor connections and clutch mechanism as applied to a rotary printing press. Fig. 2 is a similar but enarged and more detailed diagram and in which the movement of the lever is electrically controlled. v

In Fig. 1 means are shown for putting the press into motion from the continuously running motor m, either by means of a hand lever g or bv pneumatic pressure. The hand lever 9 an the controlling piston h of the pneumatic c linder h is shown in the posi- 1 tion assumed -when the press is stopped or is to the application -after described. The

ready for starting. The main motor shaft a is shown provided with a clutch b which is referably a friction clutch such as that nown as the Hole-Shaw clutch, by which connection is effected with the shaftiprovided with a gear wheel 1' in gear with a gear wheel 7" upon the counter shaft ower which gear wheel 71 transmits motion to the machine at normal speed. The motion to the press mechanism is transmitted through the gear wheel 7' which meshes with the gear wheel 7' mounted upon the counter shaft y. The slow moving shaft 0 is provided with a second clutch of which is advantageously of the jaw gripping type in which the engaged part (1 is formed integral with the gear wheel it which is freely mounted upon the slow niotion shaft c and is set in position against the collar It. This clutch d is operated by a tripping device by which it is released when the operating hand lever 9 passes the position indicated at a: as hereinclutoh (Z is engaged on the movement of the boss (Z toward the clutch d, to which boss d the toggle levers ofthe gripping jaws are connected. The part d of the clutch carrying the gripping jaws it will be understood is keyed to the slow motion shaft 0. The main motor shaft a gears positively, without the intervention of a clutch, through the countershaft Z which is suitably carried in brackets which are not shown. Such shaft Z may advantageously be geared with the main motor shaft a by means of the bevel pinions Z and Z and may communicate motion from the worm Z mounted upon it with a worm wheel l which is loosely mounted upon the communicated from' the countershaft j through the shaft m to a complementary countershaft and similar gear upon the other side of the machine or at the other side of the press,

The clutch operating gearconsists of the hand control lever g pivoted upon the spindle g :and carrying upon same spindle -g a toothed segment 9 which gears with a rack 3 mounted upon a rod 9 at the extremity'of which a piston h is connected, which works within a cylinder h, whereby on air being admitted to one side or the other of the piston h the rack g and therefore the segment 9 and the hand control lever g are moved in one direction or. the other as required to increase or decrease the speed of the machine, or 'tostop the press, the 'admission and exhaust, of air to and from the cylinder being conveniently effected by any suitable air valve such as the three way valve h which is connected to the air supply pipe h and which'is in turn connected to a receiver it, within which air may be maintained at a constant pressure by means of an air pump 7L5 operated from an eccentric h upon the main motor shaft a. The air pressure may be under the control of a stop valve such aslfi, and may be led through pipes such as b from an independent source, 'or to the controlling mechanism of the second part of the press. a i

The boss d of the clutch d is moved'by the bell crank lever n which is connected to a which a lever 0? s 'des,

movement of the operating link a whichis in turn connected to one arm of the bell crank lever M, on the extremity of which weights n depend, so that on the bell crank lever 12, being tripped by the lever g from the the weight "a would position indicated as,

d of the clutch d and serve to retract the boss thusjdisengage the freely mounted part (1.

and the pinion 7c.

' On the movement of the operating lever g from the position indicated :10, the bell crank lever n will be tri ped and will pass under the pawl n. In t is position the slow motion shaft 0 will be moving at itsfull speed, and in this position also the clutch b will be slowly put m engagement, so that when the hand lever g reaches the osition indicated 'y, the clutch 12 will be fu y engaged so that the shaft '2', will rotate at the same speed as the main motor shaft a. v This operation is effected by means of a cam piece amounted uponthe spindle g of the hand control lever g,- which is provided with a tail piece 0. "A groove is formed in the cam iece 0 Within in provided upon t e bell crank and a link'o connects to the operating lever 0 of the clutch b. After the o erating hand lever It has reached the position indicated y, the pin will reach the segmental or dead part 0 the .tail piece 0 of the 1 cam, and no further movement will be given to the clutch operating the lever 0 which will thus be held or locked in that position.

' the lower extrem ty of thehand control lever g, by'which corresponding movements'may be given to a second ratus provided upon the second part of the press or upon the second press, so that each press may be controlled together on the operation of one or other of the operating mechanisms.

In order to increase chine after it has attained its normal speed a series of contacts jp are'provided with which engage a contact brush p provided u on the operating hand lever 9, so that a ter the operating hand lever 51- passes the position indicated at y, and reaches that indicated at z circuits may be closedv by resistances and by which the motor fields may be weakened and the spe'edof the machine thereby accelerated.

Referring now to Fig. 2 in which the being controlled by means of electric solen oids, m is the main motor, field, g g are the mains, 1" is the controller and 7" indicates the magnetic blowout therefor. The contacts of the controller are minebered 1 to 10, of which110represents the nor mal full speed oint. S is thefield resistance box, and t are numbered 11 to 16 in sequence w th the starter and controller r.

It will be understood that when the 0 erating lever is moved to the position in W -ch the machine is caused to run at its normal speed, the resistances indicated by numbers 1 to 10 willbe included in the circuit. Upon further movement of the lever the resistances indicated by numbers 11 to 16 may be switched in.

What I claim as my invention to' secure by Letters Patent is. v p

1. Incombination an leetric motor,aslow speed positive clutch and a high speed frictional clutch interposed between said electric motor and the driven shaft, a hand controland desire ling lever a series of resistances in the field of A connecting rod 6 maybe connected to set of controlling appathe speed of the ma movement of the operating lever is shown as m the motor.

slow speed positive clutch, and a high sp'esde shunt control contacts p ling lever, means for operating said clutches its clutching position said electric motor switch connections where-i In testimonj whereof I 'hiive signed my by on the movement of saidhand controlling name to this specification in the presence of lever beyond its clutching positidn said re- 1 two subscribing witnesses.

sistances are increased and means whereby GEO. W'. MASCORD. 5 the said further movement of the hand con- Witnesses:

trolling lever locks the high speed clutch into WILLIAM EDWARD EVANS,

its operative position. ROBERT GAREW HUGHES. 

